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Really! o.o;
There should be no problem with the programming since a lot of people get Rama's good end. 
As for Reksa's route, you need to save him and then lie to him. That way, you'll lead Reksa to a cave. To get into his route, you'll simply have to visit Reksa whenever there's a choice to do that.

Oh, have you taken a look at my old walkthrough? OuO 
https://lemmasoft.renai.us/forums/viewtopic.php?t=36095

It's old, but the important points are there~

oh, thanks